Abstract
ZnS is a promising material for lithium-ion battery anodes due to its abundant natural resources, simplicity of synthesis, and high theoretical lithium storage capacity. However, it needs to be optimized for its low conductivity and volume effect during the charge–discharge process. The traditional method of combining with carbonaceous materials is usually laborious, and the required sulfuration process may possibly result in the destruction of materials morphology. In this study, hybrid materials formed by the combination of ZnS nanocrystals and high porosity carbon fibers were synthesized by one-step electrospinning using zinc diethyldithiocarbamate and polyacrylonitrile as raw materials and poly (ethylene glycol)—block-poly (propylene glycol)—block-poly (ethylene glycol) as template. The method is simple and avoids the influence of sulfuration process on the morphology of materials. The composite presents a specific capacity of 592.2 mAh g−1 under a current density of 1 A g−1 after 1000 cycles. The porous structure significantly decreases the diffusion mean-free path of Li+ and inhibits the volume effect associated with the lithium storage process of ZnS. In addition, the 3D cross-linked carbon fibers improve the conductivity of materials. This study can serve as an inspiration for the development of other lithium storage composites.
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Acknowledgements
This research is financially supported by the National Natural Science Foundation of China (Grant Nos. 52171207, 52104301), the Scientific Research Fund of Hunan Provincial Education Department, China (Grant Nos. 21A0392 and 21B0406), the Natural Science Foundation of Hunan Province, China (Grant No. 2022JJ40162), the Guangxi Key Laboratory of Low Carbon Energy Material (2020GXKLLCEM03).
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Wang, W., Guan, M., Wang, Q. et al. In Situ Embedment of ZnS Nanocrystals in High Porosity Carbon Fibers as an Advanced Anode Material for Efficient Lithium Storage. Acta Metall. Sin. (Engl. Lett.) 36, 167–176 (2023). https://doi.org/10.1007/s40195-022-01481-9
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DOI: https://doi.org/10.1007/s40195-022-01481-9